Oven-burner



UNITED STATES SHERMAN S. J'EWETT, OF BUFFALO, NEW YORK.

OVEN-BURNER.

Specification of Letters Patent.

.Patented Oct. 18, 1921.

Application filed November 17, 1919. Serial No. 338,474.

To all whom it may concern:

Be it known that I, SHERMAN S JnwEr'r, a citizen of the United States of America, and a resident of the city of Buffalo, county of Erie, and State of New York, have invented certain new and useful Improvements in Oven-Burners, of which the following is a full, clear, and exact description.

My invention relates generally to burners, and more particularly to an oven burner used in connection with combination coal and gas burning ranges or cook stoves.

Some of the principal objects of my invention have been to provide a simple and efficient burner of one piece construction requiring simply .a reversal of the single part burner, when the range is changed from one kind of fuel to the other.

Moreover, my burner is so designed that, when coal is to be burned in the range, the burner will occupy a position, in which it will efliciently seal the auxiliary air opening for the device. The gas mixture supply pipe is also eiiiciently sealed when not in use.

The above objects and advantages have been accomplished by the device shown in the accompanying drawings, of which:

Figure 1 is a fragmentary, sectional view of a combination range, in connection with which my burner is used.

Fig. 2 is an enlarged, fragmentary, sectional view of the burner in its position when gas is to be used for heating the oven of the range.

Fig. 3 is a similar view showing the burner in the position it occupies when coal is to be used in the range.

In the drawings, 5 represents the oven, having a top 6, side walls 7 and bottom 8; and 9 the range, having the usual top 10, side walls 11, bottom 12, fire box 13 and ash pit 14.

My oven burner is located near the bottom of the oven and arranged between the oven bottom 8 and the range bottom 12. An aperture 15 is provided in the oven bottom and an aperture 16 is provided in the range bottom 12. An annular ring 17 extends upwardly from the range bottom 12 and is provided with an inwardly extending flange 18, in which the opening 16 is formed. The ring 17 extends upwardly slightly above the level of the flange 18, so that an annular shoulder 19 is provided. The oven bottom 8 is also provided with an annular shoulder 20 extending around the opening 15 in this bottom. 21 is a cup, which is arranged between the oven bottom 8 and the range bottom 12, and is provided with flanges 22 and 23 which engage, respectively, with the shoulders 20 and 19 of the oven and range bottoms whereby a burner chamber is formed. By this construction the opening between the bottoms is properly sealed against the passage of cold air into the oven when coal is being used.

The burner comprises a bowl or mixing chamber 25, having a central, opening 26 formed at one side thereof, engageable with the mixer pipe 38, which conducts the gas mixture to the burner. An annular disk 27 is arranged at the side of the burner where the opening 26 is formed, and is of such a diameter that it will close the combustion opening 15 in the oven bottom when in registering position therewith. 28 are openings formed at the most advantageous points in the bowl 25 of the burner, through which the combustible mixture passes when the burner is lighted.

29 is the top of the burner which is provided with an extension flange 30, the diameter somewhat larger than the diameter of the opening 16 in the flange 18, whereby the opening will be closed and the joint between it and the burner sealed by engagement of the flanges 18 and 30. Extending inwardly from the top 29 of the burner is a cylindrical tube 31, which is closed at its inner end by an integral cover 32. This tube is of such a diameter and length that it will pass over the mixer pipe 38 when the burner is in the position shown in Fig. 3.

A plurality. of guide lugs 33 are provided in the upper part of the cup 21, and have their inner faces 34, preferably in line with the opening 15 of the oven bottom 8, whereby the burner will be guided centrally into the position shown in Fig.2 by the engagement of the disk 27 therewith. Supporting lugs 35 areprovided on the flange 18, and

extend upwardly to a position where they will properly support the. burner when in the position shown in Fig. 2. These supports will also act as guides to centralize the burner when it is reversed and lowered to the position shown in Fig. 3.

An inclosed recess 36 having a lip 37 is provided through the disk 27 and through the top 29, whereby the ordinary stove cover lifter may be used to lift the burner when in either position.

It will be seen, by reference to Fig. 2 where the burner is shown in its gas burning position, that the gas mixture coming up through the pipe 38 will enter the bowl 25 and pass outwardly through the combustion openings 28 formed therein and burn at or below the projecting flange 30. Additional air will pass upwardly through the openings 16 and 15 and cup 21, passlng around the disk 27. When coal is to be used in the range or heater the burner is lifted vertically, and after being reversed in position, it is lowereddown to the position shown in Fig. 3, the flanges 30 and 18 coming in contact with each other to form an eflfective seal against the passage of air up through the openings 16 formed in the range bottom.

When the burner is in this position, it will be seen that the disk 27 lies flush with the surface of the oven. bottom 8, and effectively closes the opening 15 formed therethrough.

When gas is to be used in the range, a

spreader is placed in the oven and over the burner; but, as this is well known in the art it is not deemed necessary to illustrate the same.

Having thus described my invention, what I- claim is:

1. The combination with a range provided with an oven and a burner chamber arranged beneath the oven and opening therein, of a reversible and detachable burner member adapted to provide a burner elevatedabove the bottom of the oven when in one position and to close the oven against the admission of air through the burner chamber when in the reversed position.

2. The combination with a range provided with an oven of a cup seated below the oven and forming a burner chamber opening into the oven, a reversible and detachable burnermember adapted to provide a burner elevated above the'bottom of the oven when 1n one posltion and to close the oven against the admission of air through the burner chamber when in the reversed position.

3. The combination with a range pro- 7 vided with an oven, having an openlng through the bottom thereof, of a reversible and detachable burner formed to fit withinthe opening so that it will project into the oven and providea gas burner when in one position, and will close the opening and lie 4;. The combination with a range provided with an oven, having an opening through the. bottom thereof, and a mixer pipe passing into the opening, of a reversible burner member, formed with a mixing chamber and a plurality of combustion openpipe passing into the OpeningQof a'reversi-.

ble burner member, tormed-with a mixing chamber and a plurality of combustion openings, a cylindrical closure tube projecting into the mixing chamber for closing the mixer pipe when the burner is in operative position, and a cover integral with the burner member for closing the opening 1 n theoven when the burner is in such position..

6. The combination with a range provlded with an oven, having an opening throughthe bottom thereof, and a mixer pipe passing intothe opening, of areversr ble burner member, formed with a mixing chamber and a plurality of combustion openings, a cylindrical closure tube projecting into the mixing chamber for closing the mixer pipe when the burner is in operative position, a cover integral with the burner member for closing the opening in the oven when the burner is in such position, and lugs for supporting the burner when in its operative position so that it will project into the oven.

7. The combination with a range provided with an oven, having an opening through thebottom thereof and a mixer pipe passing into the opening, of a reversible and detachable burner member, formed with a mixing chamber and a plurality of combustion openings, a cylindrical closure tube projecting into the mixing chamber for-closing the mixer pipe when the burner is in its inoperativeposition, and a cover integral with the'burner member for closing the opening in the oven when the burner is in such position.

In witness whereof, I have hereunto signed my name.

SHERMAN S. J EWETT. 

